Water Quality Report · Updated October 07, 2026
LACEY WATER DEPARTMENT
LACEY WATER DEPARTMENT delivers tap water graded B (76/100) by TapWaterSafety.org. The utility serves approximately 105,178 residents in Lacey, Washington using groundwater. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Arsenic significantly above health guideline.
Is Lacey tap water safe to drink?
LACEY WATER DEPARTMENT delivers tap water that earns a grade of B (76/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 105,178 residents in Lacey, drawing from groundwater.
Public testing data identifies 13 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Arsenic, Total trihalomethanes (TTHMs), Trichloroacetic acid, Bromodichloromethane, Nitrate, Nitrate and nitrite, Chromium (hexavalent), Dichloroacetic acid, Radium, combined (-226 and -228), Chloroform, Dibromochloromethane. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for LACEY WATER DEPARTMENT (system ID WA5343500) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Stage 2 Disinfectants and Disinfection Byproducts Rule | Missed testing or reporting | 01/01/2024 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for Lacey residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LACEY WATER DEPARTMENT.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 5.73 ppb, 95x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 8.6 ppb, 86x above the EWG health guideline of 0.1 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.308 ppb, 77x above the EWG health guideline of 0.004 ppb.
Contact LACEY WATER DEPARTMENT
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for Lacey
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 76/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
5.73 ppb | 0.06 | — | — | — | — | — | 95× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
8.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 86× over |
| Arsenic Heavy metal |
0.308 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 77× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
7.16 ppb | 0.15 | 80.0 | 100 | — | — | — | 48× over |
| Trichloroacetic acid Disinfection byproduct |
2.41 ppb | 0.1 | — | — | — | — | — | 24× over |
| Bromodichloromethane Disinfection byproduct |
0.858 ppb | 0.06 | — | — | — | — | — | 14× over |
| Nitrate Inorganic |
1.72 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 12× over |
| Nitrate and nitrite Inorganic |
1.66 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 12× over |
| Chromium (hexavalent) Heavy metal |
0.228 ppb | 0.02 | — | — | — | — | — | 11× over |
| Dichloroacetic acid Disinfection byproduct |
1.9 ppb | 0.2 | — | — | — | — | — | 9.5× over |
| Radium, combined (-226 and -228) Radiological |
0.42 pCi/L | 0.05 | 5.0 | — | — | — | — | 8.5× over |
| Chloroform Disinfection byproduct |
2.3 ppb | 0.4 | — | — | — | — | — | 5.7× over |
| Dibromochloromethane Disinfection byproduct |
0.496 ppb | 0.1 | — | — | — | — | — | 5.0× over |
| Chlorate Disinfection byproduct |
153.3 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Bromoform Disinfection byproduct |
0.0971 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Vanadium Other |
2.36 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
8.9 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.00292 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Xylenes (total) Volatile organic compound |
2.15 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.04 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.544 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.233 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.0833 ppb | 1500.0 | — | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
LACEY WATER DEPARTMENT service area
This water system serves 1 community in Thurston County, Washington. Click any city for its dedicated tap water quality page.
Find the right filter for Lacey water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.